Safety attachment for gas-burners



(No Model.)

H. ESCHWEILER. SAFETY ATTAGHMBNT FOR GAS BURNERS. No. 524,801. Patented.Au

' UNITED STATES PATENT, I OFFICE.

SAFETY ATTACHMENT 1 FOR GAS-BU RN ERSI SPECIFICAT O forming part ofLetters Patent No. 524,801, dated August 21,1891.

Applieation filed March 16, 1894- Serial No. 503,938- (No model.) I

To all whom it may concern:

Be it known that I; HENRY ESOHWEILER, a

My invention relates to a safety device and attachment for gas burners.

It consists in certain details of construction which will be more fullyexplained by reference to the accompanying drawings, in which-- Figure 1is avertical section taken through the burner and attachment, showingthe key turned in position to open in full lines, and to close in dottedlines. Fig. 2 shows the device in operation while lighted. Fig. 3 is aview taken at right angles with Figs. 1 and 2. Fig. 4 is a perspectiveview of the variable weight. Fig. 5 is a section taken through Y-- Y ofFig. 4. Fig. 6is a section through Z-Z of. Fig. 4:. Fig. 7 is a sectionthrough XX of Fig. 1.

The object of my invention is to provide an attachment for gas burnerswhich will operate automatically to stop the flow of gas if the cock beaccidentally opened, or the gas extinguished while it is open.

A is the pipe or passage through which the gas reaches the burner.

B is a narrow slit communicating with the pipe and extending through thecasing in which the key or plug 0 turns. In the plug 0 is acorresponding slit D which, as shown in Fig. 7, stands at right angleswith the slit B when the cock is closed. When turned so that the cock isopened it stands in line with the slit B and its upper side is open toadmit the gas into the hollow globular casing E. The pillar F whichcarries the burner tip, is screwed into the top of the casing E,projecting upwardly as shown. An extension G projects from the bottom ofthe pillar into the globular casing E, and has an openin g H made on onesideof it for the admission ofgas from the cas'ingE into the-pillar andthence into the burner.

I is a hollow two chambered receptacle here shown in the form-of twoglobular segments projectingin opposite directions from the centwochambers I are connected by a minute central passage K which is shownexaggerated in size in the present drawings. A body of liquid whichwillflow freely and not become clogged or frozen,is placed in thisreceptacle,

and it is afterward sealed up so as to remain there permanently. Whenthe receptacle is turned'so that one of the chambers which is filledwith the liquid, isabove the other, the liquid will graduallypassthrough from the uppermost to the lowermost of these chambars. The upperparts of the chambers are connected by a passage L which allows the airto be transferred from one to the other as the liquid flows.

M is a pin projecting from the top of the plug (J, and standing at oneside of the center so as to be eccentric thereto. This pin is so placedthat when the cock is closed it will stand in the position shown indotted lines in Fig 1, and pressing against the inclined bottom ofthe'right hand chamber of the receptacle, it will force it into theposition shown in dotted lines with the right hand portion above theleft hand portion. Theliquid will then gradually flow from the righthand portion of the receptacle into the left hand'portion which willthus be filled and made heavier than the right hand portion. When thecock is opened, the pin M impinges against the bottom of the left handportion of the receptacle, as shown in Fig. 1, and turns it upward sothat the liquid may commence to flow from the left to the right handportion. At the same time gas will flow from the pipe A through thecasing E, the hole H on the side oi the projection G and into the pillarF,'thence to the burner where it is ignited.

Within the pillar F is fixed a bar of expansible metal such as aluminumor any other suitable metal which will expand consider-' ably by heat.The upper part of this bar is of the bar N,thence extends down throughthe opening in the bottom of the pillar into the extension G, and isthere bent at right angles so as to have a small projection Q whichpoints toward the opening H. When the bar .N is cold, the elasticity ofthe wire 0 withdraws the point Q so that it stands entirely within thechamber in the projection G. As soon, however, as the bar N expands itpresses upon the bight of the wire 0, and thus forces the unattachedpart outwardly, as shown in Fig. 2, so that the point Q then projectsthrough the opening H in the side of the projection G. While this isoccurring, the liquid in that portion of the receptacle I which isuppermost is being gradually transferred into the part on theright sidewhich is lowermost until a sufficient amounthas passed in to make itsweight greater than the'part on the left. This causes the receptacle torotate upon its pivots a little farther than it was moved by the pin Mwhen originally turned, it then standsin the position shown inFig. 2.

His a valve fixed upon the face of the left hand portion of thereceptacle in such a position that when the device has thus turned uponits pivots, thisvalve will be swung up opposite the opening H throughwhich the gas flows. into theprojection G, and thence to the burner, butas the expansion of the bar N has forcedthe' wire 0 to the left so thatthe point Q projects through this open in g H, the valve will. strikeagainst this point, and will thus be prevented from closing the openingH as long as the gas remains lighted.

If, however, the gas should be extinguished either accidentally orotherwise, the cooling and contraction of the bar N relieve the pressureuponthe wire 0 and the point Q is thenwithdrawn into the projection G,thus allowing the valve R to close the opening II and prevent any escapeof gas to the burner. If the cock is turned to admit gas to the burner,and the gas is not ignited, the receptacle I will be first-turned by thepin M into the position shown in Fig. 1, the gas will be allowed to fiowinto and out of the burner through the opening H, because at this timethe valve R does not close the opening H.

In the time set for the liquid to flow from the left to the right partof the receptacle I, (which may be one or two minutes) the liquid willhave passed into the right hand portion, and its weight will thencomplete the rotation of the receptacle, so that the valve R will thenclose the opening H, and prevent any further escape of gas through theburner although the cock may still remain open.

Whenever the cock is closed, the pin M will act against the right sideof the receptacle, and will turn it into the position shown,

in dotted lines- 1n hlg. 1, so that the liquid will again flow from theright to the left side and be in readiness for further operation.

7 Having thus described my invention-, what I claim as new, and desireto secure by Letters Patent, is-

1. The combination of a gas burner, a supply pipe and a cock by whichgas is admitted from the pipe to the burner, of an intermediate closedcasing, a receptacle adapted to rotate therein having a valve which willclose the passage to the burner,said receptacle containing a movablematerial which will automatically gravitate or travel from one part to ithe other and turn it on its axis, and a pin upon the plug of the cockwhereby the receptacle is turned from one side to the other when thecock is closed or opened.

2. In a gas burner, the combination with the burner the pipe from whichgas is supplied thereto, and a controlling cock, of an interposedchamberhaving atwo-part liquid containing receptacle pivoted therein,and a passage whereby the liquid passes slowly from one part to theother when the receptaele is tilted about its axis, and a valve can riedby the receptacle, adapted to' cut oif the flow of gas to the burner.

8. In a gas burner, a .pin projecting from the cock and engaging thereceptacle so as to tilt it in position to allow the liquid to pass fromone side tothe other, a valve formed on the upper side which remainsopen after the receptacle has been turned by opening the cock, and isadapted to close the opening to the burner when the weight of liquid hasbeen transferred soas toturn the receptacle sufficiently for thepurpose:

4:. In a gas burner, a pillar and tip, a pipe through which gas issupplied and a controlling. cock o-r key, an interposed casing having atwo part liquid containing receptacle pivoted torotate therein, withpassage by which the liquid is slowly transferred from one side to theother when the filled portion is uppermost, a pin projecting from theplug of the cock whereby the receptacle is tilted with one partuppermost when the cock is closed, and with the other part uppermostwhen it is opened, substantially as described.

5. In a gas burner, the pillar and burner tip, a pipe by which gas issupplied thereto, and a controlling cock,a-n interposed chamber throughwhich the gas flows, a projection from the bottom of the pillar intosaid chamber having an opening on one side for the admission of gasthrough it to the tip, a twopart liquid containing receptacle pivoted torotate within the chamber, an eccentric pin projecting from the plug ofthe; cock adapted to form contact with either of the two sides of thereceptacle so as to turn one part uppermost when the cock is closed andthe other part uppermost when it is opened whereby the liquid will flowfrom the uppermost to the lowermost chamber through the. connectingpassage, a valve fixed to the part which is uppermost when the cock isopen, 1n such a position that when the weight of the liquid has beentransferred to the other side,,thereceptacle will be turned so that thevalve will close the opening to the burner.

6. Ina gas burner, the pillar with the burner a pin projecting from theplug of the cook whereby the full side of the receptacle is turnedupwardly when the cock isopen, a valve fixed upon the upper side of thispart of the receptacle, a chamber connecting with the burner having anopening in one side opposite to said valve,'an expansion bar fixed inthe pillar so as to be acted upon by the heat when the gas is lighted, abent wire having one end fixed in the bottom of the pillar, the bightpassing over the upper part of the bar, and the opposite end extendinginto the chamber in the projection below, having the point turnedoutwardly in line with the opening so that the expansion of the barforces this point outwardly and prevents the valve from closing theopening while the gas remains lighted.

In witness whereof I have hereunto set my hand.

HENRY V ESCHWEILER.

Witnesses:

GEO. H. STRONG, S. H. NoURsE.

